Repair shim for brake linings



Ap 1930- v s. A.- GRUBER I 3 ,353

REPAIR SHIM FOR BRAKE LININGS Filed May 21, 1929 INVENTOR I and the drumsurface.

Patented Apr. 29,1930

UNITED {STA SAMUEL A. GRUBER, on v TIES,

ERONA, PENNSYLVANIA, ASSIGNOB, OF ONE-HALF TO HYATT M. CRIBBS, OEVERONA, Ii?ENNSYLVANIA I tIlilIAIIR, SHI M FOR BRAKE LININGS 7Application filed May 21, I

In case of either inwardly or outwardly expanding brakes, such forinstance as are used on motor vehicles, the lining is attached by rivetsto the brake band. In time the lining tends to wear so as to improperlyor unevenly The object which I have'in View is the provision of a repairdevice which may be quickly and conveniently applied and which willrestore the brakes to the proper efliciency, prolong the effective lifeof worn brake linings and also prevent contact between the rivetsGenerally speaking my invention comprises a relatively thin metal shimwhich may be driven between the brake lining and the brake band, theshim-being soformed as to straddle I the rivets. I I also provide meansfor fixing the shim in place. I In the accompanying drawings, in which Ihave illustrated the principles of my invention, Fig. 1 is a view inperspective of the band and brake lining of an outwardly expandingbrake. i 1

Fig. 2 is a plan view of my improved repair I device. I V I Fig. 3 is asectional view taken. along the line 33 in Fig. 1. 7

Referring to the drawings, 1 represents the ordinary brake band,illustrated as ofthe outwardly expanding type and having suitableconnections at its end. 2 represents the brake lining attached on thebrake band by means of the rivets 3. I

The repair shim comprises a relatively thin metalstrip 4: of somewhatgreater width than that of the, brake band and lining.

The strip of metal is stamped or cut to form the spaced apart fingers 5which extend inwardly from one of the lateral edges of the strip butstop short of the oppositeedge of the strip to leave the continuous webor back- I ing shown best in Fig. 3.

The shim iscut to the proper length for the 1929. Serial No. 364,770.

purpose in hand and is driven in between the brake band 1 and the liningfrom one side, the fingers 5 straddling the rivets 3. When thecontinuous or web edge of the strip. is flush with the edges of-thebrake band and lining, the ends of the fingers 5 which protrude at theother side are bent back over the edge of the brake band, thus clinchingthe device in place.

My improved repair shim may be applied toinwardly contracting brakebands with equally good results. I

The application of my improved repairshim sets up the worm lining sothat it will properly and evenly grip the brake. drums and will preventsqueaking and scoring of the brake drums by holding the rivets out ofcontact with the latter. e j I The spaced apart fingers'of the shim willimpart a more or less wavy or undulating gripping surface to the lining,thus'forming vacuum pockets when tightened against the drum andimproving the braking effect.

Again the fingers of the shim being of thin metal and spaced apart willact as fins to radiatethe heat arising from braking friction,

thus aiding in ke heating. I I

The-shims may be applied quickly and conveniently on the road withoutrequiring either special tools or skill. I

What I desire to claim is I A repair shim for a brake lining riveted ona bandcomprising a thin metal strip provided eping the brakes fromoverwith spaced apart fingers extending inwardly from one lateral edgeso that the shim may be dr ven between the lining and its supportingband, the fingers straddling the rivets, and the fingers being ofsuflicient' length to protrude past the lining and the band, so as to beclinched back over theband to clamp the shim in lace.

igned at Verona, Pa. this 10th day of May SAMUEL A. GRUBER.

